package com.hualidianping.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hualidianping.dto.LoginFormDTO;
import com.hualidianping.dto.Result;
import com.hualidianping.dto.UserDTO;
import com.hualidianping.entity.User;
import com.hualidianping.mapper.UserMapper;
import com.hualidianping.service.IUserService;
import com.hualidianping.utils.EmailUtil;
import com.hualidianping.utils.RegexUtils;
import com.hualidianping.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.connection.BitFieldSubCommands;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.servlet.http.HttpSession;

import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import static com.hualidianping.utils.RedisConstants.*;
import static com.hualidianping.utils.SystemConstants.USER_NICK_NAME_PREFIX;

@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Autowired
    private EmailUtil emailUtil;
    @Autowired
    private StringRedisTemplate stringRedisTemplate;
    @Override
    public Result sendCode(String phone, HttpSession session) {
        //1.检验邮箱号
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.不符合返回错误信息
            return Result.fail("邮箱格式错误！");
        }
        //3.符合，生成验证码
        String code = RandomUtil.randomNumbers(6);
        //redis
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_CODE_TTL,TimeUnit.MINUTES);
        //5.发送验证码
        log.debug("发送短信验证码成功，验证码：{}",code);
//        boolean success=emailUtil.sendEmailCode(code,"1678569103@qq.com",phone);
//        if(!success){
//            return Result.fail("验证码发送失败！");
//        }
        //返回成功
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        //1.检验手机号
        String phone = loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            //2.5不符合，返回错误信息
            return Result.fail("手机格式错误！");
        }
        //3.检验验证码
        String cacheCode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY + phone);
        String code = loginForm.getCode();
        if(cacheCode==null||!cacheCode.equals(code)){
            //3.5不一致报错
            return Result.fail("验证码错误！");
        }
        //4.一致，根据手机号查询用户
        User user = query().eq("phone", phone).one();
        //5.判断用户是否存在
        if(user==null){
            //6.不存在，创建用户并保存
            user=createUsrWithPhone(phone);
        }
        UserDTO userDTO= BeanUtil.copyProperties(user,UserDTO.class);
        //7.保存用户信息到redis中
        String token= UUID.randomUUID().toString(true);
        //将User对象转为HashMap存储
        Map<String,Object> userMap=BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create().setIgnoreNullValue(true)
                        .setFieldValueEditor((fieldName,fieldValue)->fieldValue.toString()));
        //存储
        String tokenKey=LOGIN_USER_KEY+token;
        stringRedisTemplate.opsForHash().putAll(tokenKey,userMap);
        //设置token有效期
        stringRedisTemplate.expire(tokenKey,LOGIN_USER_TTL, TimeUnit.MINUTES);
        //返回token
        return Result.ok(token);
    }

    @Override
    public Result sign() {
        //1.获取当前登录用户
        Long userId = UserHolder.getUser().getId();
        //2.获取日期
        LocalDateTime now = LocalDateTime.now();
        //3.拼接key
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key=USER_SIGN_KEY+userId+keySuffix;
        //4.获取今天是本月的第几天
        int dayOfMonth=now.getDayOfMonth();
        //5.写入redis
        stringRedisTemplate.opsForValue().setBit(key,dayOfMonth-1,true);
        return Result.ok();
    }

    @Override
    public Result signCount() {
        //1.获取当前登录用户
        Long userId = UserHolder.getUser().getId();
        //2.获取日期
        LocalDateTime now = LocalDateTime.now();
        //3.拼接key
        String keySuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key=USER_SIGN_KEY+userId+keySuffix;
        //4.获取今天是本月的第几天
        int dayOfMonth=now.getDayOfMonth();
        //5.获取本月截止今天为止的所有的签到记录，返回的是一个十进制的数字 BITFIELD sign：5:202203 GET u14 0
        List<Long> result = stringRedisTemplate.opsForValue().bitField(
                key,
                BitFieldSubCommands.create()
                        .get(BitFieldSubCommands.BitFieldType.unsigned(dayOfMonth)).valueAt(0)
        );
        if(result==null||result.isEmpty()){
            return Result.ok(0);
        }
        Long num = result.get(0);
        if(num==null||num==0){
            return Result.ok(0);
        }
        int count=0;
        while (true){
            //数字与1做与运算，得到最后一个bit位
            if((num&1)==0){
                //为0，说明未签到，结束
                break;
            }else {
                //不为0，已签到，计数+1
                count++;
            }
            //数字右移一位，抛弃最后一个bit位，继续下一位
            num>>>=1;
        }
        return Result.ok(count);
    }

    private User createUsrWithPhone(String phone) {
        User user=new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX+RandomUtil.randomString(10));
        //保存
        save(user);
        return user;
    }
}
